CN110010328A - Common-mode filter - Google Patents
Common-mode filter Download PDFInfo
- Publication number
- CN110010328A CN110010328A CN201910008338.4A CN201910008338A CN110010328A CN 110010328 A CN110010328 A CN 110010328A CN 201910008338 A CN201910008338 A CN 201910008338A CN 110010328 A CN110010328 A CN 110010328A
- Authority
- CN
- China
- Prior art keywords
- coiling
- circle
- common
- mode filter
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims description 64
- 239000010410 layer Substances 0.000 claims 15
- 239000002356 single layer Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 12
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/09—Filters comprising mutual inductance
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F2017/0093—Common mode choke coil
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0035—Wound magnetic core
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0092—Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
- Filters And Equalizers (AREA)
Abstract
The present invention provides a kind of common-mode filter of micro-adjustment that can carry out high frequency characteristics.Has core (23) and along equidirectional first and second coiling (W1, W2) for being wound in core (23).A defined circle for first coiling (W1) is intersected more than twice with a defined circle for the second coiling (W2).According to the present invention, first and second coiling (W1, W2) is crossed over many times in same circle, therefore, can be according to number of crossings and crossover location, the high frequency characteristics of micro-adjustment common-mode filter.
Description
Technical field
The present invention relates to a kind of common-mode filters, more particularly to the common mode filtering for the micro-adjustment that can carry out high frequency characteristics
Device.
Background technique
Common-mode filter is widely used in portable as the element for removing the common-mode noise Chong Die with differential signal lines
In formula electronic equipment and vehicle-mounted LAN etc., a large amount of electronic equipments.In recent years, instead of using the common-mode filter of ring type magnetic core,
Having used the common-mode filter that can carry out the drum type magnetic core of surface installation is mainstream (referring to patent document 1).
Common-mode filter documented by patent document 1 is improved in high-frequency region by intersecting a pair of of coiling in midway
Differential signal symmetry.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2014-199904 bulletin
Summary of the invention
Invention technical problem to be solved
But when making coiling, when midway intersects, the positional relationship of a pair of of coiling is reverse, therefore, the big amplitude variation of high frequency characteristics
Change.Therefore, in the method for intersecting a pair of of coiling only once, it is difficult to which high frequency characteristics is micro-adjusted.
Therefore, the common-mode filter of the micro-adjustment of high frequency characteristics can be carried out the object of the present invention is to provide one kind.
For solving the means of technical problem
The present invention provides a kind of common-mode filter, which is characterized in that has core and is wound in core along equidirectional
First and second coiling in portion, defined 1 circle of the first coiling are intersected more than twice with defined 1 circle of the second coiling.
According to the present invention, first and second coiling is crossed over many times in same circle, therefore, can be according to number of crossings and friendship
Vent is set, the high frequency characteristics of micro-adjustment common-mode filter.
In the present invention, defined 1 circle of defined 1 circle of the first coiling and the second coiling can also with first and second around
One side of line become upside, and another party of first and second coiling become downside mode intersected more than twice.
It is crossed over many times thereby, it is possible to keep the first coiling and the second coiling not twisted in same circle.
In the present invention, can also include with core: the first wrapping range of the one end in axis direction be located at axis side
Second wrapping range of upward another side and the third wrapping range between first and second wrapping range, the
One and second coiling constitute be wound in the first volume of the first wrapping range around block and be wound in the volume Two of the second wrapping range around
Block, the first coiling and the second coiling intersect in third wrapping range, the rule of defined 1 circle and the second coiling of the first coiling
1 fixed circle is contained in the first volume around block.Accordingly, the first volume is got higher around block and volume Two around the symmetry of block, therefore, can be obtained good
Good high frequency characteristics.
In the present invention, can also with first and second winding block have positioned at lower layer the first winding layer and be located at the first volume around
Second winding layer on the upper layer of layer, the first volume includes around block: an orientation of first and second coiling is in the first winding layer, and first
And second another party of coiling be located at the first level portion of the second winding layer；And first and second coiling be respectively positioned on the first volume around
The non-hierarchical portion of layer, defined 1 circle of the first coiling and defined 1 circle of the second coiling are contained in non-hierarchical portion.Accordingly, pass through
Non-hierarchical portion is set, changing with mode for the voxel between the first coiling and the second coiling is resulted from.Specific mechanism
It is unknown, but by the variation, even there is a pair of of coiling, portion intersects at one end, and a pair of of coiling is uncrossed in the other end
In the case where difference, imbalance caused by the difference is also mitigated, as a result, reflection characteristic can be improved.Moreover, making first and second
Coiling is crossed over many times in non-hierarchical portion, therefore, also improves noise transformation characteristic (such as Ssd21 characteristic).
In the present invention, can also with volume Two around block include first and second coiling an orientation in the first winding layer, and the
One and second another party of coiling be located at the second level portion of the second winding layer.Accordingly, the first volume is around block and volume Two around block
Symmetry is got higher, and therefore, more good high frequency characteristics can be obtained.
In the present invention, the number of turns in the first level portion can also be equal with the number of turns in the second level portion.Accordingly, by first and
The part that two coilings intersect becomes symmetric figure as symmetry axis, the first level portion and the second level portion, therefore, can be obtained further
Superior high frequency characteristics.
In the present invention, the first winding layer can also be located in the first level portion, the first coiling, the second coiling is located at volume Two
Winding layer, in the second level portion, the first coiling is located at the second winding layer, and the second coiling is located at the first winding layer.Accordingly, can be reduced
The difference of the length of one coiling and the second coiling.
Common-mode filter of the invention is also equipped with: the first flange part is set to one end in the axis direction of core；The
Two flanges portion, the other end being set in the axis direction of core；First and second terminal electrode is set to the first flange
Portion, and it is separately connected one end of first and second coiling；And third and forth terminal electrode, it is set to the second flange part,
And it is separately connected the other end of first and second coiling, non-hierarchical portion is located at one end and the first level portion of first and second coiling
Between.Accordingly, changing with mode for the voxel of the adjacent one end of first and second coiling can be made.
, can also be in the first volume around block in the present invention, the first coiling and the second coiling carry out even-times intersection, volume Two around
In block, the first coiling and the second coiling are once intersected in the final circle of the other end closest to first and second coiling.According to
This, before and after the defined circle of first and second coiling, the position relationship of the first coiling and the second coiling, therefore,
Fine-tuning whole high frequency characteristics.
Invention effect
In this way, according to the present invention, it is possible to provide the common-mode filter of the micro-adjustment of high frequency characteristics can be carried out.
Detailed description of the invention
Fig. 1 is the general perspective view for indicating the appearance of common-mode filter 10 of the preferred embodiment of the present invention；
Fig. 2 is the schematic diagram for the winding layout of first and second coiling W1, W2 to be described in more detail；
Fig. 3 is the expanded view of core 23, indicates the part that non-hierarchical portion NL is wound；
Fig. 4 is the expanded view for indicating the variation of winding pattern of non-hierarchical portion NL；
Fig. 5 is the expanded view for indicating another variation of winding pattern of non-hierarchical portion NL；
Fig. 6 is the schematic diagram for illustrating situation that the first coiling W1 and the second coiling W2 intersect in the 24th circle；
Fig. 7 is another signal for illustrating situation that the first coiling W1 and the second coiling W2 intersect in the 24th circle
Figure；
Fig. 8 is the another signal for illustrating situation that the first coiling W1 and the second coiling W2 intersect in the 24th circle
Figure；
Fig. 9 is the schematic diagram for illustrating the winding layout of the common-mode filter 10A of first variation；
Figure 10 is the schematic diagram for illustrating the winding layout of the common-mode filter 10B of the second variation；
Figure 11 is the schematic diagram for illustrating the winding layout of the common-mode filter 10C of third variation；
Figure 12 is the expanded view for indicating an example of the winding pattern of non-hierarchical portion NL of third variation；
Figure 13 is the schematic diagram for illustrating the winding layout of the common-mode filter 10D of the 4th variation.
Symbol description
10,10A~10D ... common-mode filter；20 ... drum type magnetic cores；21 ... first flange parts；22 ... second
Flange part；21b, 22b ... mounting surface；21s, 22s ... lateral surface；The upper surface 21t, 22t ...；23 ... cores；
The side 23A, 23C ...；The upper surface 23B ...；The lower surface 23D ...；30 ... plate magnetic cores；41 ... first terminals electricity
Pole；42 ... second terminal electrodes；43 ... third terminal electrodes；44 ... forth terminal electrodes；The first winding area A1 ...
Domain；The second wrapping range of A2 ...；A3 ... third wrapping range；B1 ... the first volume is around block；B2 ... volume Two is around block；
The first level of L1 ... portion；The second level of L2 ... portion；The non-hierarchical portion NL ...；The first winding layer of S1 ...；S2 ... second
Winding layer；The first coiling of W1 ...；The second coiling of W2 ....
Specific embodiment
Hereinafter, the preferred embodiment of the present invention is described in detail with reference to accompanying drawings.
Fig. 1 is the general perspective view for indicating the appearance of common-mode filter 10 of the preferred embodiment of the present invention.
As shown in Figure 1, the common-mode filter 10 of present embodiment has: drum type magnetic core 20, plate magnetic core 30, the first~the
Four terminal electrodes 41~44, first and second coiling W1, W2.Drum type magnetic core 20 and plate magnetic core 30 utilize Ni-Zn based ferrite
It is constituted Deng the higher magnetic material of, magnetic permeability.In addition, first~forth terminal electrode 41~44 is made of the good conductor of copper etc.
Metal parts.First~forth terminal electrode 41~44 is also possible to the electricity obtained to 20 direct sintering silver paste of drum type magnetic core etc.
Pole.
Drum type magnetic core 20 includes the first flange part 21, the second flange part 22 and the core being set between them
23.Core 23, which has, is set as axis direction for the direction x, and first and second flange part 21,22 is respectively set at its both ends, and will
Their integrated structures.Plate magnetic core 30 is adhered to upper surface 21t, 22t of flange part 21,22.The upper table of flange part 21,22
Face 21t, 22t constitute x/y plane, and the face of opposite side can be used as mounting surface 21b, 22b.Moreover, first and second terminal electrode
41, the 42 mounting surface 21b and lateral surface 21s for being set to the first flange part 21, third and forth terminal electrode 43,44 are set to
The mounting surface 22b and lateral surface 22s in two flanges portion 22.Lateral surface 21s, 22s constitute the face yz.First~forth terminal electrode 41~
44 fixation is carried out by bonding agent etc..
First and second coiling W1, W2 is wound in core 23 along the same direction.Moreover, one end of the first coiling W1 and
The other end is connected to first and third terminal electrode 41,43, and the one end and the other end of the second coiling W2 is connected to
Two and forth terminal electrode 42,44.The number of turns of first and second coiling W1, W2 are same to each other.
As shown in Figure 1, the core 23 of drum type magnetic core 20 includes: the first wrapping range positioned at 21 side of the first flange part
A1, the third volume positioned at the second wrapping range A2 of 22 side of the second flange part, between first and second wrapping range A1, A2
Around region A3.It is wound moreover, first and second coiling W1, W2 is arranged in first and second wrapping range A1, A2, and in third
Wrapping range A3 intersects.When first and second coiling W1, W2 intersect, before and after it, the position of first and second coiling W1, W2
Set relationship change.
Fig. 2 is the schematic diagram for the winding layout of first and second coiling W1, W2 to be described in more detail.
As shown in Fig. 2, first and second coiling W1, W2 constitute be wound in the first volume of the first wrapping range A1 around block B1 and
The volume Two of the second wrapping range A2 is wound in around block B2, as described above, intersecting in third wrapping range A3.Shown in Fig. 2
Example in, first and second coiling W1, W2 are 24 circle structures being made of the first circle~the 24th circle, but the present invention is not
It is defined in this.In addition, first and second winding block B1, B2 all have double-layer structure.It is located at lower layer it is, having and directly rolls up
Be around in core 23 the first winding layer S1 and positioned at the first winding layer S1 upper layer and be wound in via the first winding layer S1
Second winding layer S2 of core 23.
Moreover, the first volume includes that the first coiling W1 is located at the first winding layer S1 (lower layer), and the second coiling W2 around block B1
In the first level portion L1 and non-hierarchical portion NL of the second winding layer S2 (upper layer).In present embodiment, with first and second end
Sub-electrode 41,42 is in the case that starting point counts the number of turns, the first circle of first and second coiling W1, W2 constitute non-hierarchical portion
The second circle~the 12nd circle of NL, the first coiling W1 and the second circle~the 11st circle of the second coiling W2 constitute the first level portion
L1.In addition, the 12nd circle of the second coiling W2 is located at the first winding layer S1, but the 12nd circle of the second coiling W2 can also be seen
Make a part of the first level portion L1.This needs the paddy along the coiling for being located at lower layer to stablize the coiling of double-layer structure
The coil of wire is around the coiling on upper layer, and therefore, the number of turns for the coiling for being located at lower layer positioned at the turn ratio of the coiling on upper layer tails off 1 circle, therefore,
The 12nd circle of second coiling W2 meets with it.
Fig. 3 is the expanded view of core 23, indicates the part that non-hierarchical portion NL is wound.
In example shown in Fig. 3, first and second coiling W1, W2 is intersected twice in non-hierarchical portion NL.In Fig. 3, volume
Side 23A, 23C of core 23 are the face xz, and upper surface 23B and lower surface 23D are the face xy.Upper surface 23B and flange part 21,22
Upper surface 21t, 22t are towards the same direction, and mounting surface 21b, 22b of lower surface 23D and flange part 21,22 are towards the same direction.
Moreover, in upper surface, 23B and side 23C, the first coiling W1 and the second coiling W2 intersect in example shown in Fig. 3.In this way,
Non-hierarchical portion NL, the first coiling W1 and the second coiling W2 are intersected twice, therefore, in cross section positioned at upside coiling from
First winding layer S1 (lower layer) local detachment, but in non-hierarchical portion NL, substantially first and second coiling W1, W2 is respectively positioned on first
Winding layer S1 (lower layer).Especially in the edge part of the core 23 extended along the direction x, constitute non-hierarchical portion NL first and
Second coiling W1, W2 both sides connect with core 23, constitute the first winding layer S1.
In non-hierarchical portion NL, first and second coiling W1, W2 are intersected twice, therefore, the first coiling W1 and second around
The positional relationship of line W2 is locally replaced, but result reverts to initially.In example shown in Fig. 3, in appointing for crossover location twice
One position, the first coiling W1 are located at downside, and the second coiling W2 is located at upside, but upper and lower relation may be reversed.If any
Position becomes upside with a side of first and second coiling W1, W2, another party of first and second coiling W1, W2 become
The mode of downside, is intersected twice, then will not be twisted the first coiling W1 and the second coiling W2 and be wound.In addition,
There is the edge of the core 23 extended along the direction x in the boundary of upper surface 23B and side 23C that coiling intersects, in the part
First and second coiling W1, W2 are fixed, therefore, even if not being twisted the first coiling W1 and the second coiling W2, intersection will not be released.
The crossover location of the first coiling W1 and the second coiling W2 in non-hierarchical portion NL are not limited to position shown in Fig. 3,
For example, as shown in figure 4, the first coiling W1 and the second coiling W2 can also be made to intersect on upper surface 23B and lower surface 23D.?
It is exactly to intersect the first coiling W1 and the second coiling W2 on which face to be arbitrary.In addition it is also possible to make on one face
One coiling W1 and the second coiling W2 are intersected twice, but in this case, in order to not release intersection on the face, need using
It is set to positioning first and second coiling W1, the W2 such as protrusion of core 23, or the side for being twisted first and second coiling W1, W2 etc.
Method.
In addition, the number of crossings of the first coiling W1 and the second coiling W2 in non-hierarchical portion NL are not limited to twice, it can also
As shown in Figure 5 for four times.In example shown in fig. 5, the first coiling W1 and the second coiling W2 side 23A, 23C, on
Intersect on all faces of surface 23B and lower surface 23D.In this case, number of crossings is also even number, therefore, the first coiling
The positional relationship result of W1 and the second coiling W2 revert to initially.In addition, though it is not shown, but can also cutting core 23
Face shape is set as 6 side shapes, and intersects the first coiling W1 and the second coiling W2 six times in non-hierarchical portion NL.
In this way, the crossover location and number of crossings of the first coiling W1 and the second coiling W2 in non-hierarchical portion NL do not limit
Fixed, high frequency characteristics knifeedge changes according to crossover location and number of crossings.Therefore, as long as being selected according to the high frequency characteristics for being set as purpose
Select crossover location and number of crossings.
On the other hand, volume Two includes the first coiling W1 around block B2 and is located at the first winding layer S1 (lower layer) and the second coiling
W2 is located at the second level portion L2 of the second winding layer S2 (upper layer), and does not have non-hierarchical portion.Second level portion L2 by first around
The 14th circle~the 24th circle of line W1 and the 15th circle~the 24th circle of the second coiling W2 are constituted.In addition, second around
The 14th circle of line W2 is located at the first winding layer S1, but due to above-mentioned, can also be regarded as the second level portion L2's
A part.
By above-mentioned structure, the first volume is in block B1, and the number of turns of the first winding layer S1 (lower layer) is 14, the second winding layer
The number of turns of S2 (upper layer) is 10, and difference is 4.On the other hand, in block B2, the number of turns of the first winding layer S1 (lower layer) is volume Two
The number of turns of 12, the second winding layer S2 (upper layer) are 10, and difference is 2.In this way, in present embodiment, with regard to the first winding layer S1 and
For the difference of the number of turns of two winding layer S2, the first volume around mono- side of block B1 than volume Two 2 circles more than the block B2.The difference of 2 circle is i.e. by non-
Caused by the presence of level portion NL.In non-hierarchical portion NL, the capacity that is generated between the first coiling W1 and the second coiling W2 at
That divides is different from first and second level portion L1, L2 with mode.
Moreover, the 13rd circle of first and second coiling W1, W2 intersect in third wrapping range A3.When first and
When two coiling W1, W2 intersect, before and after it, the positional relationship of the first coiling W1 and the second coiling W2 are reverse.Specifically, in the presence of
For eye when the same circle of the first coiling W1 and the second coiling W2, the first volume is in the first level portion L1 of block B1, the first coiling W1
Positioned at the left side (21 side of the first flange part) of Fig. 2, and the second coiling W2 is located at the right side (22 side of the second flange part) of Fig. 2, therewith
Relatively, volume Two is in block B2, and the first coiling W1 is located at right side (22 side of the second flange part), and the second coiling W2 is located at left side
(21 side of the first flange part).As a result, using third wrapping range A3 as symmetry axis, the first level portion L1 and the second level portion L2 become
Therefore symmetric figure gets higher in the signal of the first coiling W1 circulation and the symmetry of the signal in the second coiling W2 circulation, ties
Excellent high frequency characteristics can be obtained in fruit.Moreover, in present embodiment, the number of turns of the first level portion L1 and the second level portion L2's
Therefore equal turn numbers can obtain very excellent high frequency characteristics.
As shown in Figure 1, in present embodiment, the direction y of first and the third terminal electrode 41,43 of the first coiling W1 connection
Position is identical, and the direction the y position of second and the forth terminal electrode 42,44 of the second coiling W2 connection is identical.Moreover, from Fig. 1
Shown in arrow V observation, first and the third terminal electrode 41,43 of the first coiling W1 connection be located at right side, the second coiling W2 company
Second and the forth terminal electrode 42,44 connect is located at left side.It therefore, is initial point with first and second terminal electrode 41,42, by
One and second coiling W1, W2 when being wound from arrow V along right rotation (rotating clockwise), as long as intersecting coiling, the
In the same circle of one coiling W1 and the second coiling W2, the first coiling W1 is located at the left side (21 side of the first flange part) of Fig. 2, second around
Line W2 is located at the right side (22 side of the second flange part) of Fig. 2.In present embodiment, the first coiling W1 and the second coiling W2 are non-hierarchical
Portion NL intersects, but its number of crossings is even number, and therefore, which maintains to the whole region of the first level portion L1.
Moreover, when intersecting the first coiling W1 with the second coiling W2, the first coiling W1 and second
The positional relationship of coiling W2 is reverse.Therefore, volume Two is in block B2, in the same circle of the first coiling W1 and the second coiling W2, the
One coiling W1 is located at the right side (22 side of the second flange part) of Fig. 2, and the second coiling W2 is located at left side (the first flange part 21 of Fig. 2
Side).
But as described above, third terminal electrode 43 is located at right side, forth terminal electricity from arrow V shown in FIG. 1
Pole 44 is located at left side, therefore, in order to which the terminal part of the first coiling W1 and the second coiling W2 are connected to third and the 4th end
Sub-electrode 43,44 needs to intersect the first coiling W1 and the second coiling W2 again, the positional relationship of the two is reverted to most
Just.In present embodiment, constitute volume Two in first and second coiling W1, W2 of block B2, make the first coiling W1 and second around
Line W2 intersects in the 24th final circle closest to third and forth terminal electrode 43,44.
Fig. 6 is the schematic diagram for illustrating situation that the first coiling W1 and the second coiling W2 intersect in the 24th circle.
As shown in fig. 6, first terminal electrode 41 is located at right side, second terminal electrode 42 from arrow V
Positioned at left side, therefore, when intersecting first and second coiling W1, W2 and to wind along right rotation (rotating clockwise), the
One coiling W1 is located at 21 side of the first flange part, and the second coiling W2 is located at 22 side of the second flange part.The positional relationship volume Two around
Block B2 is reverse, and the first coiling W1 becomes 22 side of the second flange part, and the second coiling W2 becomes 21 side of the first flange part.In the state
Under, when the terminal of first and second coiling W1, W2 are connected to third and forth terminal electrode 43,44, from arrow V
Observation, third terminal electrode 43 is located at right side, and forth terminal electrode 44 is located at left side, therefore, is such as indicated with symbol C, first around
Line W1 and the second coiling W2 intersects in the 24th final circle.
Here, as Fig. 7 shows, on leaving y direction of the third terminal electrode 43 with forth terminal electrode 44 at a distance from feelings
Under condition, when plane earth is observed (when from the direction z), it appears that the first coiling W1 and the second coiling W2 are visual in the 24th circle
Do not intersect.But in this case, as shown in figure 8, the first coiling W1 and the second coiling W2 is in the side the xz (side of core 23
Face 23C) intersect.It is, intersect first and second coiling W1, W2 in the 24th circle, the first coiling W1 and as a result,
The positional relationship of two coiling W2 reverts to initially.
In this way, first and second coiling W1, W2 does not intersect in the one end for being connected to first and second terminal electrode 41,42,
And only once intersected in the other end for being connected to third and forth terminal electrode 43,44.Therefore, first and second coiling
Having in mode for the voxel with mode and another side of the voxel of side generates difference at one end by W1, W2, should
Imbalance can become the reason of deteriorating reflection characteristic.But the common-mode filter 10 of present embodiment first and second around
Non-hierarchical portion NL is selectively arranged in the one end of line W1, W2, therefore, improves reflection characteristic.It is also indefinite for the mechanism, but
By the way that non-hierarchical portion NL is arranged, have mode and an other end in the voxel of the one end of first and second coiling W1, W2
Having in mode for the voxel of side generates new difference, it is believed that this facilitates above-mentioned unbalanced mitigation.
Moreover, so that the first coiling W1 and the second coiling W2 is carried out even-times intersection in non-hierarchical portion NL in present embodiment,
Therefore, thus, it is possible to micro-adjustment high frequency characteristicses.Specifically, there is the common-mode filter 10 of structure shown in FIG. 1 to FIG. 3 and incite somebody to action
The case where number of crossings in non-hierarchical portion NL is set as zero is compared, and noise transformation characteristic (Ssd21 characteristic) can be improved.
As described above, the common-mode filter 10 of present embodiment winds the first coiling W1 and the second coiling W2 in third
Region A3 intersects, and therefore, the first volume is improved around block B1 and volume Two around the symmetry of block B2.Moreover, the first volume wraps in block B1
Containing non-hierarchical portion NL, therefore, the imbalance generated due to intersection of the volume Two at the 24th circle of block B2, knot are mitigated
Fruit can improve reflection characteristic.Moreover, so that the first coiling W1 and the second coiling W2 is carried out even-times intersection in non-hierarchical portion NL, because
This, can also be according to its crossover location and number of crossings micro-adjustment high frequency characteristics.
Especially in present embodiment, the number of turns of first and second coiling W1, W2 in non-hierarchical portion NL are 1 circle, because
This, can improve the reflection characteristic of the frequency band of 10MHz~400MHz.Moreover, being contained in the first volume around block B1's in present embodiment
First level portion L1 and be contained in volume Two around the equal turn numbers of the second level portion L2 of block B2, therefore, by first and second around
Line W1, W2 are set as symmetry axis in the part that third wrapping range A3 intersects, and the first level portion L1 and the second level portion L2 become pair
Claim shape.As a result, superior high frequency characteristics can be obtained.
Hereinafter, some variations to common-mode filter 10 are illustrated.The structure of variation described below includes
In scope of the presently claimed invention.
Fig. 9 is the schematic diagram for illustrating the winding layout of the common-mode filter 10A of first variation.
Common-mode filter 10A shown in Fig. 9 is 2 circles constituting first and second coiling W1, W2 of non-hierarchical portion NL,
On this point, different from the common-mode filter of above embodiment 10.It in this case, can also be by first and second coiling
W1, W2 carry out even-times intersection in the first circle, can also carry out even-times intersection in the second circle, can also be in first and second circle
Both sides carry out even-times intersection.First variation such as example constitutes the number of turns of first and second coiling W1, W2 of non-hierarchical portion NL
It is not particularly limited.As long as constituting the number of turns of first and second coiling W1, W2 of non-hierarchical portion NL according to whole the number of turns and mesh
Target high frequency characteristics determines.
Figure 10 is the schematic diagram for illustrating the winding layout of the common-mode filter 10B of the second variation.
Common-mode filter 10B shown in Fig. 10 in the second level portion L2, the second coiling W2 be located at the first winding layer S1 (under
Layer), the first coiling W1 is located at the second winding layer S2 (upper layer), at this point, the common-mode filter 10 with above embodiment
It is different.For the 24th circle of the first coiling W1, it is located at the first winding layer S1 (lower layer), but can also be regarded as the second layer
A part of secondary portion L2.Second deformation such as example, the upper and lower relation of first and second coiling W1, W2 can also be in the first levels
Portion L1 and the second level portion L2 is reverse.Accordingly, there are the length of the length of the first coiling W1 and the second coiling W2 are roughly equal
Advantage.
Figure 11 is the schematic diagram for illustrating the winding layout of the common-mode filter 10C of third variation.
The non-hierarchical portion NL of common-mode filter 10C shown in Figure 11 is configured at volume Two around the side block B2.Specifically, first
The first circle of the first circle of coiling W1~the 11st circle and the second coiling W2~the tenth circle (or the 11st circle) constitute the first level
The 12nd circle of portion L1, first and second coiling W1, W2 intersect, the 13rd circle~the 23rd circle and second of the first coiling W1
The 14th circle (or the 13rd circle)~the 23rd circle the second level portion L2 of composition of coiling W2, and first and second coiling W1,
The 24th circle of W2 constitutes non-hierarchical portion NL.As the common-mode filter 10 of above embodiment, first and second coiling
The 24th circle of W1, W2 carry out even-times intersection, and are once handed near third and forth terminal electrode 43,44
Fork.It is, total carry out odd-times intersection.Alternatively, as shown in figure 12, can also make on core 23 first coiling W1 and
Second coiling W2 is intersected three times.In this case, it does not need to carry out one near third and forth terminal electrode 43,44
Secondary intersection.Third deforms such as example, number of crossings can also be set as odd-times according to the position of non-hierarchical portion NL.
Figure 13 is the schematic diagram for illustrating the winding layout of the common-mode filter 10D of the 4th variation.
In common-mode filter 10D shown in Figure 13, non-hierarchical portion NL is configured at the first volume around block B1 and volume Two around block B2
Both sides.Specifically, the second circle of the first circle composition non-hierarchical portion NL, the first coiling W1 of first and second coiling W1, W2~
The second circle of 12nd circle and the second coiling W2~the 11st circle (or the 12nd circle) constitute the first level portion L1, first and second
The 13rd circle of coiling W1, W2 intersects, and the 15th of the 14th circle~the 23rd circle of the first coiling W1 and the second coiling W2 the
Circle (or the 14th circle)~the 23rd circle constitutes the second level portion L2, in addition, the 24th of first and second coiling W1, W2 the
Circle constitutes non-hierarchical portion NL.4th deformation such as example, can also be according to the characteristic acquired, in the first volume around block B1 and volume Two
Non-hierarchical portion NL is configured around block B2 both sides.
More than, the preferred embodiment of the present invention is illustrated, but the present invention is not limited to above-mentioned embodiment,
It can make various changes without departing from the spirit and scope of the present invention, these are also included within the scope of the present invention certainly.
For example, in above embodiment, when manufacturing first and second coiling W1, W2, from the first circle to the 24th circle
It is illustrated premised on winding, but can also be opposite to that, is made and being wound from the 24th circle to the first circle.
Claims (13)
1. a kind of common-mode filter, which is characterized in that
Have:
Core；And
First and second coiling is wound in the core along the same direction,
Defined 1 circle of first coiling is intersected more than twice with defined 1 circle of second coiling.
2. common-mode filter according to claim 1, which is characterized in that
First coiling it is described as defined in 1 circle and second coiling it is described as defined in 1 circle with it is described first and second
One side of coiling become upside, and another party of first and second coiling become downside mode carry out more than twice
Intersect.
3. common-mode filter according to claim 1, which is characterized in that
The core includes: the first wrapping range of the one end in axis direction, another in the axis direction
Second wrapping range of end side and the third wrapping range between first and second described wrapping range,
First and second described coiling constitutes the first volume for being wound in first wrapping range around block and is wound in described second
The volume Two of wrapping range around block,
First coiling and second coiling intersect in the third wrapping range,
1 circle as defined in defined 1 circle of first coiling and the described of second coiling is contained in the first volume
Around block.
4. common-mode filter according to claim 3, which is characterized in that
First and second described winding block has positioned at the first winding layer of lower layer and positioned at the upper layer of first winding layer
Second winding layer,
The first volume includes around block: an orientation of first and second coiling is in first winding layer, and described first
And second another party of coiling be located at the first level portion of second winding layer；First and second described coiling is respectively positioned on described
The non-hierarchical portion of first winding layer,
1 circle as defined in defined 1 circle of first coiling and the described of second coiling is contained in described non-hierarchical
Portion.
5. common-mode filter according to claim 4, which is characterized in that
The volume Two around block include first and second coiling an orientation in first winding layer, and described first and
Another party of second coiling is located at the second level portion of second winding layer.
6. common-mode filter according to claim 5, which is characterized in that
The number of turns in first level portion and the equal turn numbers in second level portion.
7. common-mode filter according to claim 5, which is characterized in that
In first level portion, first coiling is located at first winding layer, and second coiling is located at described the
Two winding layers,
In second level portion, first coiling is located at second winding layer, and second coiling is located at described first
Winding layer.
8. the common-mode filter according to any one of claim 5~7, which is characterized in that
It is also equipped with:
First flange part is set to described one end of the axis direction of the core；
Second flange part is set to the other end of the axis direction of the core；
First and second terminal electrode is set to first flange part, and is separately connected first and second coiling
One end；And
Third and forth terminal electrode are set to second flange part, and are separately connected first and second coiling
The other end,
The non-hierarchical portion is located between described one end and first level portion of first and second coiling.
9. common-mode filter according to claim 8, which is characterized in that
In the first volume around block, first coiling and second coiling carry out even-times intersection, the volume Two around
Block, first coiling and second coiling the other end closest to first and second coiling final circle into
Row is primary to intersect.
10. a kind of common-mode filter, which is characterized in that
Have:
Core；And
First and second coiling, is wound in the core, and including the first and second circles,
First circle of first and second coiling carries out even-times intersection each other,
Second circle of first and second coiling does not intersect.
11. common-mode filter according to claim 10, which is characterized in that
First and second described coiling further includes third circle,
The third circle of first and second coiling carries out odd-times intersection each other.
12. a kind of common-mode filter, which is characterized in that
Core includes the first, second, third, fourth and fifth region being arranged successively along axis direction,
First and second coiling is wound on the core,
First and second described coiling is intersected with each other primary in each of the third and the 5th region,
First and second described coiling described second and the fourth region each in do not intersect,
First and second described coiling in the first area it is intersected with each other twice.
13. common-mode filter according to claim 12, which is characterized in that
First and second described coiling described second and the fourth region each in constitute double-layer structure,
First and second described coiling constitutes single layer structure in the first area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110504209.1A CN113178303B (en) | 2018-01-05 | 2019-01-04 | Common mode filter |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-000752 | 2018-01-05 | ||
| JP2018000752A JP7040021B2 (en) | 2018-01-05 | 2018-01-05 | Common mode filter |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110504209.1A Division CN113178303B (en) | 2018-01-05 | 2019-01-04 | Common mode filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110010328A true CN110010328A (en) | 2019-07-12 |
| CN110010328B CN110010328B (en) | 2021-06-01 |
Family
ID=66995558
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910008338.4A Active CN110010328B (en) | 2018-01-05 | 2019-01-04 | Common mode filter |
| CN202110504209.1A Active CN113178303B (en) | 2018-01-05 | 2019-01-04 | Common mode filter |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110504209.1A Active CN113178303B (en) | 2018-01-05 | 2019-01-04 | Common mode filter |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10958233B2 (en) |
| JP (1) | JP7040021B2 (en) |
| CN (2) | CN110010328B (en) |
| DE (1) | DE102019100007B4 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111834084A (en) * | 2019-04-19 | 2020-10-27 | 株式会社村田制作所 | Coil component |
| CN113808830A (en) * | 2020-06-16 | 2021-12-17 | Tdk株式会社 | Common mode filter |
| CN113808828A (en) * | 2020-06-16 | 2021-12-17 | Tdk株式会社 | Common mode filter |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7063132B2 (en) * | 2018-06-11 | 2022-05-09 | 株式会社村田製作所 | Coil parts |
| JP7270122B2 (en) * | 2019-12-25 | 2023-05-10 | パナソニックＩｐマネジメント株式会社 | common mode choke coil |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887041A (en) * | 2014-01-14 | 2014-06-25 | 深圳顺络电子股份有限公司 | Surface-mounted type common-mode choker and manufacturing method thereof |
| US20150206646A1 (en) * | 2013-12-13 | 2015-07-23 | Pulse Electronics, Inc. | Methods and apparatus for improving winding balance on inductive devices |
| CN106415747A (en) * | 2014-05-19 | 2017-02-15 | 株式会社村田制作所 | Common-mode choke coil and manufacturing method therefor |
| CN107275041A (en) * | 2016-04-06 | 2017-10-20 | 株式会社村田制作所 | Coil component |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008034777A (en) | 2006-07-31 | 2008-02-14 | Taiyo Yuden Co Ltd | Common mode choke coil |
| CN101567248B (en) * | 2008-02-29 | 2012-07-25 | Tdk株式会社 | Balance-unbalance transformer using a drum-shaped core |
| JP4877264B2 (en) * | 2008-04-02 | 2012-02-15 | Ｔｄｋ株式会社 | Balun Trans |
| JP5765400B2 (en) | 2013-03-15 | 2015-08-19 | Tdk株式会社 | Common mode filter |
| KR101468821B1 (en) * | 2012-12-19 | 2014-12-03 | 티디케이가부시기가이샤 | Common mode filter |
| JP2014207368A (en) * | 2013-04-15 | 2014-10-30 | 株式会社村田製作所 | Common mode choke coil |
| DE102014103324B4 (en) | 2014-03-12 | 2022-11-24 | Tdk Electronics Ag | Inductive component and method for producing an inductive component |
| JP6269593B2 (en) | 2015-06-23 | 2018-01-31 | 株式会社村田製作所 | Wire winding method and wire winding apparatus |
| JP6680037B2 (en) | 2016-03-30 | 2020-04-15 | Tdk株式会社 | Common mode filter |
| JP6333321B2 (en) * | 2016-08-23 | 2018-05-30 | Tdk株式会社 | Common mode filter |
| JP6202165B2 (en) * | 2016-08-23 | 2017-09-27 | Tdk株式会社 | Common mode filter |
-
2018
- 2018-01-05 JP JP2018000752A patent/JP7040021B2/en active Active
- 2018-12-30 US US16/236,563 patent/US10958233B2/en active Active
-
2019
- 2019-01-02 DE DE102019100007.6A patent/DE102019100007B4/en active Active
- 2019-01-04 CN CN201910008338.4A patent/CN110010328B/en active Active
- 2019-01-04 CN CN202110504209.1A patent/CN113178303B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150206646A1 (en) * | 2013-12-13 | 2015-07-23 | Pulse Electronics, Inc. | Methods and apparatus for improving winding balance on inductive devices |
| CN103887041A (en) * | 2014-01-14 | 2014-06-25 | 深圳顺络电子股份有限公司 | Surface-mounted type common-mode choker and manufacturing method thereof |
| CN106415747A (en) * | 2014-05-19 | 2017-02-15 | 株式会社村田制作所 | Common-mode choke coil and manufacturing method therefor |
| CN107275041A (en) * | 2016-04-06 | 2017-10-20 | 株式会社村田制作所 | Coil component |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111834084A (en) * | 2019-04-19 | 2020-10-27 | 株式会社村田制作所 | Coil component |
| US11495385B2 (en) | 2019-04-19 | 2022-11-08 | Murata Manufacturing Co., Ltd. | Coil component |
| US11848135B2 (en) | 2019-04-19 | 2023-12-19 | Murata Manufacturing Co., Ltd. | Coil component |
| CN113808830A (en) * | 2020-06-16 | 2021-12-17 | Tdk株式会社 | Common mode filter |
| CN113808828A (en) * | 2020-06-16 | 2021-12-17 | Tdk株式会社 | Common mode filter |
| CN113808830B (en) * | 2020-06-16 | 2023-06-09 | Tdk株式会社 | Common mode filter |
| CN113808828B (en) * | 2020-06-16 | 2024-09-13 | Tdk株式会社 | Common mode filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110010328B (en) | 2021-06-01 |
| DE102019100007A1 (en) | 2019-07-11 |
| CN113178303B (en) | 2023-06-09 |
| DE102019100007B4 (en) | 2024-07-25 |
| JP2019121693A (en) | 2019-07-22 |
| US10958233B2 (en) | 2021-03-23 |
| US20190229697A1 (en) | 2019-07-25 |
| JP7040021B2 (en) | 2022-03-23 |
| CN113178303A (en) | 2021-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110010328A (en) | Common-mode filter | |
| CN110010327A (en) | Common-mode filter | |
| CN110033929A (en) | Common-mode filter | |
| JP5825249B2 (en) | Common mode filter | |
| CN106960715B (en) | Common-mode filter | |
| KR101955903B1 (en) | Multilayer common mode filter | |
| JP6010746B2 (en) | Common mode noise filter | |
| CN108346502A (en) | Common-mode filter | |
| JP7204468B2 (en) | common mode filter | |
| CN103684326A (en) | Filter | |
| JP6333321B2 (en) | Common mode filter | |
| CN103457563A (en) | Electronic component | |
| CN105684305A (en) | Electronic component | |
| JP2007129291A (en) | Noise filter and noise filter circuit | |
| CN107171042A (en) | A kind of frequency-selective surfaces structure | |
| CN111145985A (en) | Laminated sheet type common mode filter | |
| CN107045925A (en) | Coil component | |
| CN111769094A (en) | Inductor stack structure and radio frequency amplifier | |
| CN113808828B (en) | Common mode filter | |
| CN209591754U (en) | Transformer is laminated | |
| CN104883152B (en) | A kind of broadband, low fluctuation band logical LC wave filters | |
| JP6583472B2 (en) | Common mode filter | |
| CN113808830A (en) | Common mode filter | |
| CN106656090A (en) | On-chip filter circuit and on-chip filter chip | |
| JP2021197479A (en) | Common mode filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |